Ultrasonic cleaner



FIG. 1 is an exploded perspective view of an ultrasonic cleaner showing my new design;

FIG. 2 is a front perspective view thereof;

FIG. 3 is a top plan view thereof;

FIG. 4 is a left side elevational view thereof;

FIG. 5 is a right side elevational view thereof;

FIG. 6 is a front elevational view, the rear being a mirror image thereof; and

FIG. 7 is a bottom plan view thereof. 

The ornamental design for an ultrasonic cleaner, as shown and described. 